Okay, so I have two problems that I am wondering if they are connected to each other. First, when start up my main pump, I see quite a bit of air rushing in to the pump basket from the suction side pipe. It only occurs at startup and it occurs immediately after I turn on the pump but the air goes away quickly. Every once in a while I see a bubble or two come in to the basket after the pump is already on. However, the pump doesn't have any problems with priming.
The other problem i have is some DE getting in to the pool. At first I thought it was the grids (I have a Pentair 48 DE filter) and so I replaced almost all of the grids (one was replaced about 6 mos ago). However, the sand is still somehow getting in to the pool. Could the air coming in to the filter be the culprit?
All my O rings are new and lubed. Not really sure where to go from here.
Thanks in advance for any advice.